On the eve of her wedding, sister Isabella is pushed into the deep sea by her younger sister Sylvia and her fiancé Theo. Three years later, she returns as the cold-blooded female CEO Hera Kim, acquires her enemy's family business, imprisons the unfaithful man as her personal assistant, and closes in step by step with poison-apple red lips and a serpent necklace. As the truth recedes like the tide — the betrayal, the drugging, and the ancient coin curse of that night gradually surface — a fateful strangulation of love and revenge has only just begun.
